Lactic acid and PLA: Emissions

Does sugar-based plastic really cut carbon?

What this tab covers The greenhouse-gas footprint per tonne, split by lifecycle phase (feedstock, production, movement, use, end of life), the global total, other environmental impacts, levers and low-carbon routes, India's position, and where the investment opportunity lies. Emission intensity 0.60 t CO2e per t range about 0.5-1.5 depending on sugar source, energy and whether biogenic carbon uptake is counted (indicative) · cradle-to-gate including uptake of biogenic carbon in the polymer; NatureWorks Ingeo 2014 eco-profile

Per t of PLA, cradle-to-gate (polymer pellet). Intensity: Vink and Davies, Industrial Biotechnology 2015 (Ingeo 2014 LCI), about 0.62 (indicative, from memory). Global total: not published.

Footprint by lifecycle phase

Phase	Intensity	Share	Main sources of emissions	Notes	Source
Feedstock	not separately published	–	sugarcane or maize farming, fertiliser N2O, land use; credit for carbon taken up by the crop	cradle-to-gate totals net out biogenic uptake of about 1.8 t CO2 per t PLA (stoichiometric, indicative)	indicative
Production / process	not separately published	–	fermentation steam, lactide distillation, polymerisation energy	NatureWorks claims renewable energy use at Blair (indicative)	indicative
Movement	small	–	container shipping from Thailand or the US		indicative
Use	not applicable	–	inert in use		not applicable
End of life	about 1.8 t biogenic CO2 per t if composted or incinerated (stoichiometric, indicative)	–	industrial composting, incineration, landfill (slow; possible methane)	PLA contaminates PET recycling streams; chemical recycling (Futerro LOOPLA) is small	indicative

Other environmental impacts

Land and water for sugar; eutrophication from fertiliser; gypsum from classical fermentation; microplastic risk if it does not reach composting.

Levers to cut emissions

Lower sugar per kg PLA (Balrampur targets 1.6 to 1.5 kg)
Bagasse or biogas steam at integrated sugar-PLA sites
Gypsum-free fermentation
Composting and PLA-specific collection or chemical recycling

India

Balrampur's Kumbhi plant will draw cane sugar from the adjacent mill (Swarajya, 2026), so it can use bagasse power and steam. India's ethanol surplus of 8-9 billion litres a year frees sugar for such products (S&P Global, 2026).

Emission figures are indicative global averages from the life-cycle studies named; actual footprints vary widely by site, energy mix and method.

Low-carbon routes

Route	Intensity	Cost premium	Status	Source
PLA from cane with bagasse cogeneration (Thailand, India)	below the Ingeo average (not published)	PLA itself costs roughly 1.5-3 times PET or PS (indicative)	NatureWorks Thailand 75 kt (opened 29 Apr 2026); Balrampur 80 kt (commissioning Oct 2026)	Yahoo Finance 2026; Swarajya 2026; indicative

For a climate investor PLA is the most mature bio-based plastic, but its demand rests on policy: compostable mandates, enforcement of single-use plastic rules and composting infrastructure. What has to be true in India: enforcement of the single-use plastic rules, brand willingness to pay a premium, and Balrampur reaching its sugar-yield targets. Watch Balrampur's start-up and utilisation, NatureWorks' Thailand ramp-up and Chinese prices; the cancelled Grandpuits plant shows how thin the economics are.